A printhead maintenance facility for an inkjet printer having a pagewidth printhead and a media path for feeding sheets of media substrate in a media feed direction, wherein the pagewidth printhead has an elongate array of nozzles extending the printing width of the media substrate. The printhead maintenance facility has an inner chassis for mounting in the printer such that it can rotate about its longitudinal axis, an outer chassis mounted to the inner chassis, the outer chassis having a plurality of maintenance station mounting sites and a plurality of maintenance stations mounted to the outer chassis.